zinc phosphate cement


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

zinc phos·phate ce·ment

a powder, containing primarily zinc oxide mixed with a liquid containing orthophosphoric acid to form a hard crystalline mass on standing, used in dentistry as a luting agent for cast metal restorations and orthodontic bands, and as a temporary restorative material, or a base under restorations, particularly in deep cavities.

zinc phosphate cement

The oldest of the dental cements, composed of a powder (zinc oxide and magnesium oxide) and a liquid (phosphoric acid and water). An acid-base reaction occurs when the powder and liquid are mixed. The set cement is unreacted zinc oxide particles suspended within a matrix of zinc aluminophosphate. The cement is used for inlays, crowns, bridges, and orthodontic appliances.
See also: cement

zinc phos·phate ce·ment

(zingk fosfāt sĕ-ment)
Powder, containing primarily zinc oxide mixed with a liquid containing orthophosphoric acid to form a hard crystalline mass on standing, used in dentistry as a luting agent for cast metal restorations and orthodontic bands, and as a temporary restorative material, or a base under restorations, particularly in deep cavities.
Synonym(s): zinc oxyphosphate cement.
References in periodicals archive ?
The glass ionomer cement exhibit higher compressive strengths than zinc phosphate cement.
A positive hypothesis was attained with regard to the cements demonstrating significant difference in bond strength values among each of the three types of cements, wherein resin cements showing the highest values followed by glass ionomer cement and zinc phosphate cement with lowest values.
The glass ionomer cement showed mixed type of fracture with predominantly cohesive failure, whereas for zinc phosphate cement the bond is completely dependent on the micromechanical retention.
26) Despite the findings of Lund and Wilcox, who reported that the preparation did not affect the tensile strength of cast posts-and-cores luted with zinc phosphate cement, they observed that post retention was reduced with increased severity of preparation, showing that the time expended on preparation is indeed relevant.
The zinc phosphate cement setting period has been defined as between 2 and 8 min.
This variability is common in studies testing the tensile strength of cast posts-and-cores luted with zinc phosphate cement.
TABLE 2: PERCENT WEIGHT LOSS OF###SPECIMENS OF ZINC PHOSPHATE CEMENT IMMERSED FO 96 H INARTIFICIAL SALIVA ADJUSTED TO VARIOUS PH VALUES AT 37degC
Many studies have shown that the resistance to dissolution of glass ionomer cement was more than zinc phosphate cement.
Zinc phosphate cement presented higher solubility at high pH medium but the solubility of glass ionomer cement was higher at low pH values after 96 hours immersion.